If you are interested in more than one car, place your items of interest in your cart and "Request Invoice".  

For Combined Shipping:

1.  Put all items you would like in the cart.

2.  View cart (at the top of your page).  

3.  Hit "Request Total from Seller" button

4.  Wait for a combined invoice from me before paying.  

Some phones or tables may not have the request button - if that is the case, you can reach out to me directly and let me know all items you'd like to purchase.